Release the camera and return false to indicate that you did not consume the
event so that the built-in Glass camera starts.

Note: If you return true from
onKeyDown(), your activity consumes the event and the Glass camera doesn't start.
Do this only if there is no way to interrupt your activity's use of
the camera (for example, if you are capturing continuous video).

After the image or video capture takes place, Glass returns to your
activity, where you can reclaim the camera in
onResume().

The path to the full image is available from the
Intent's
extra with the
EXTRA_PICTURE_FILE_PATH
key. When the image capture intent returns control to your
Glassware, the image might not be fully written to file. Verify
that the image file exists or use a
FileObserver
to monitor its parent directory. When the full image is
available, load the file and use it in your Glassware.